COMMISSIONS AND FEES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Commissions and fees
Total commissions and fees	$ 3,138	$ 3,368
Credit cards and bank cards
Commissions and fees
Total commissions and fees	820	865
Investment banking
Commissions and fees
Total commissions and fees	654	647
Trading-related
Commissions and fees
Total commissions and fees	608	691
Transaction Services
Commissions and fees
Total commissions and fees	373	374
Other Consumer
Commissions and fees
Total commissions and fees	216	217
Checking-related
Commissions and fees
Total commissions and fees	238	225
Loan servicing
Commissions and fees
Total commissions and fees	40	146
Corporate finance
Commissions and fees
Total commissions and fees	134	128
Other
Commissions and fees
Total commissions and fees	$ 55	$ 75